Facilitated Diffusion Differs from Simple Diffusion Because

Multiple Choice

Facilitated diffusion differs from simple diffusion because

A) facilitated diffusion requires energy, simple diffusion does not
B) simple diffusion requires a membrane, but facilitated diffusion does not
C) facilitated diffusion requires a carrier molecule, but simple diffusion does not
D) facilitated diffusion moves substances against a concentration gradient, but simple diffusion moves substances down a concentration gradient
E) in facilitated diffusion, the solvent moves through a membrane, but in simple diffusion the solute moves through the membrane